Assembly Section Views and Fasteners 2

[evolDiesel]

Hey guys,

Can anyone tell me what ASME Y14.3M has to say about doing assembly section views containing fasteners like bolts, screws, nuts, washers, etc.???

We are in a debate at my work about what objects you don't section in a section view. All I have here are subsets of the ASME standard (GD&T, Revisioning, etc.) and some school text books. It looks like you don't section some items, but I'm not sure exactly what. Is there's a simple rule to this?

Thanks SO MUCH in advance for some help on this -

Jack

Jack Lapham
Design Systems Engineer (E20)
Leupold & Stevens, Inc.

http://www.leupold.com

 

[KENAT]

Had a quick look at section 3 of 14.3-2003 and didn't see it explicitly specified what if any parts of a sectioned assembly may be 'not sectioned'.

Does say at the end of 3.1.1 "Section lining may be omitted where drawing clarity is not affected".

I've typically seen fasteners and similar not sectioned, but for an item like a washer I'm not sure of the typical convention. I suppose which ever gives more 'clarity'.

KENAT,

Have you reminded yourself of faq731-376 recently, or taken a look at posting policies:

http://eng-tips.com/market.cfm?

What is Engineering anyway: faq1088-1484

 

[weavedreamer]

4.3 Non-sectioned Items in the Cutting Plane
4.3.1 Sectioning Assembled Items. Where the cutting plane lies along the longitudinal axis of items such as shafts, bolts, nuts, rods, rivets, keys, pins, screws, ball or roller bearings, gear teeth, spokes, and the like, these parts are not sectioned except where internal construction must be shown.

 

[KENAT]

Doh, if only I'd read a bit further. Well done weavedreamer.

KENAT,

Have you reminded yourself of faq731-376 recently, or taken a look at posting policies:

http://eng-tips.com/market.cfm?

What is Engineering anyway: faq1088-1484

 

[evolDiesel]

Weavedreamer,

That was exactly the verbage I was looking for. I've found similar wording in documents that reference ASME and DOD drafting standards.

For example:

Shafts, bolts, nuts, rods, rivets, keys, pins and similar solid parts, the axes of which lie in the cutting-plane, should not be sectioned.
Engineering Drawing and Design, 4th ed., 1991, pg.161

and...

Shafts, nuts, bolts, rods, rivets, keys, pins and similar pats, whose axes lie in the cutting plane, are not cross-sectioned.
Drawing Requirements Manual (based on DOD-STD-100), 6th ed., 1986, pg.3-23

Anyway... thanks you guys... that was exactly what I was looking for.

Jack


Jack Lapham
Design Systems Engineer (E20)
Leupold & Stevens, Inc.

http://www.leupold.com